Logel



G. D. WISELOGEL.

GULTIVATOR OR HARROW TOOTH.

No. 462,675. Patented N0.v.3,1891.

INVENTOQ? 1V1 TWESSES 91 2201728 ysd.

.llnrrnn STATES PATENT Orrron.

CIlRIiSTIAh D. WISELOGEIJ, OF ALBION, MICHIGAN, ASSIGXOR TO THE GALE MANUFACTURING COMPANY, OF SAME PLACE.

CULTIVATOR OR HARROW TOOTH.

SPECIFICATION forming part of Letters Patent No. 462,675, dated November 3, 1891. Application filed July 11, 1891. Serial No. 399,137. (No model.)

To aZZ whom it may concern..- the head of the rivetsD and adapted to leave Be it known that I, CHRISTIAN D. \VIsE- a perfectly smooth surface on the face of the LOGEL, a citizen of the United States, residtooth. IVhen the tooth and plate are thus ing at Albion, in the county of Calhoun and engaged, the bolt F is also permanently en- State of Michigan, have invented a new and gaged with them, and these parts so assemuseful Improvement in Teeth for lIarrows, led are engaged with the shank by inserting Cultivators, &c., of which the following is a the projection E in the rectangular opening specification. .a in the shank, and the washer f is passed My invention relates to cultivators; and its over the bolt and the nut f screwed on and to purpose is to provide an improved form for the whole tightened to place. The washer f the shank for supporting the tooth and imis of sufficient size to cover the opening a. proved methods of engaging the tooth with The projection E, as I have stated, is not the shank, and an improved form for the tooth, of sufficient depth to extend entirely through whereby it is adapted to the improved form the orifice a, so that the tightening of the 15 of engagement with the shank. nutf does not bring the face of this projec- My invention relates specifically to that tion against the washerf, but rather seats form of tooth and method of engaging the the projection E firmly in the orifice a and tooth where the bolt holding a tooth to the brings the plate B firmly against the front of shank has its support back of the tooth to the shank. It is manifest that this construc- 20 avoid exposing it to the wear of the tooth, tion brings the shearing strain of the tooth and where the tooth may be removed from and its supporting parts on the projection E the shank without removing the bolt and rather than on the bolt F, leaving the bolt F breaking or disturbing the polished surface merely holding the tooth in its place on the of the tooth; also, in further provision for shank. The rectangular form of the projec- 2 5 avoiding a shearing strain on the bolt holding tion serves further to avoid twisting of the the tooth. tooth sidewise. This feature is materially In the drawings, Figure 1 shows the shank, aided by the construction of the shank A, in plate for holding the tooth, the. Fig. 2 shows which the forged portion (6 is extended forthe parts assembled. ward around the point a, so as to fit the plate 0 In the drawings, A is the shank, which is B and to bring the tooth B at its upper porformed. as shown, by taking a flat bar of iron tion back against the shank and avoid a space and forging the section between the upper for the accumulation of debris between the point of support and the point of engagei'nent shank and the tooth. with the tooth, so as to bring the greatest It is manifest that the tooth and its attach- 5 weight of cross-section in the direction of the ment may be removed and reversed and still strain incident to the work. The lower secretain the full value of my special method of tion of the shank is provided with the openengaging it with the shank and utilize the ing a, rectangular in form. B is an indespecial form of the shank shown. pendent plate, formed as shown and provided \Vhat I claim is 0 on the back with the lug or projection E, 1. The combination of a shank A, having 0 adapted to fill the orifice o in the shank, but angular perforation at extending clear through not of sufficient depth to extend entirely the same, a cultivator-tooth point provided through the orifice. Extending through the with a block or casting engaged therewith plate B and through the lug or projection E and having an angular projection E, adapted 45 is the plate F, having its head countersunk to fit within and project partly through said in the face of the plate B. To the face of the perforation, a bolt F, extending through said plate B is riveted by rivets D the tooth B. projection, and a n ut f and washer f extend- This engagement between the tooth B and ing beyond the edges of said perforation, the plate B is permanent, and the polishing whereby the block is bound to the shank and 50 of the wearing-face of the tooth B is over the angular projectionEfirmly seated within IOO the orificeaand the bolt relieved from lateral and the bolt, washer, and nut, substantially to strain, substantially as described. as shown and described. I

2. The combination of a. shank A, provided In testimony whereof I sign this specificawith recessed portion a, and having an antion' in the presence of two witnesses. 5 gular perforation a, extending through the w i v T ,T 1

extremity Of the Shank, eultivator-toofih B, (JHRIS HAL block 0, adapted to fit in the recess a and I Witnesses:

provided with an angular projection extend- H. GALE, ing partly through the angular perforation a, B. W. AUSTIN. 

